1. Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education School of Mechanical Engineering Shandong University Jinan Shandong 250061 P. R. China
2. National Demonstration Center for Experimental Mechanical Engineering Education Shandong University Jinan Shandong 250061 P. R. China
3. Suzhou Research Institute Shandong University Suzhou 215123 P. R. China
4. Department of Clinical Laboratory The Second Hospital Cheeloo College of Medicine Shandong University 247 Beiyuan Street Jinan Shandong 250033 P. R. China